Device for the repair or other treatment of metal or castings by the liquid method



J. l0, T939. C, O. 1 BRMS 2,43,758

DEVICE FOR THE REPAIR OR OTHER TREATMENT OF METAL OR CASTINGS BY THE LIQUID METHOD Filed Dep. 28, 1936 2 Sheets-Sheet l j.. i939.. C; c)n 1, BRMS 143,75

DEVICE FOR THE REPAIR V0R OTHER TREATMENT 0F METAL i 193e 2 sheets-sheet 2 OR CASTINGS BY THE LIQUID METHOD iled Deo. 28,

Hq. 4a

Patented Jan. 1.0, 19739 PATENT OFFICE DEVICE FOR THE REPAIR OR OTHER TREATMENT F METAL OB. CASTINGS BY THE LIQUID METHOD Carl Olof Johannes Brms, Bjorneborg, Sweden Application December 28, 1936, Serial No. 117,980 In Germany September 20, 1935 3 Claims.

The invention relates to a device and method for the repair or other treatment of metal or castings by the liquid method.

It has already been suggested to join parts to metal members by casting, the casting metal being poured directly from the casting ladle on to the portion of the member to which the part is to be joined and which portion is surrounded with a mould. It has been found with this process i that the joint made by this method is frequently not satisfactory because the molten metal encounters the point where connection is to be effected while it is in the form of a stream which is too large and too Wide and having insufficient kinetic energy so that frequently an adequate softening of the surface of the member where junction is to be effected is not attained.

p Funnels have already been proposed for welding by means of molten metal, the said Tunnels being movable but possessing no outlet pipe. It has therefore not been possible to direct the stream of metal into all corners and the procedure has been difficult and complicated. Funnels capable of being taken apart have also been proposed to serve as a directing channel.

In contrast to the above proposals the present invention relates to a device for the repair or other treatment of castings or other metal by the liquid method, consisting of or including a funnel having an outlet pipe, the outlet aperture of which is constricted.

rIhe lower part of the lining of the outlet pipe in the vicinity of the outlet aperture is conveniently made so as to be readily replaceable.

The funnel may be provided with an articulated suspension at its upper part and with a guide device at its middle or lower part.

The drawings illustrate by way of example one way of carrying the invention into effect.

Figure l is a vertical longitudinal section illustrating the repair of a journal of a roll.

Figure la is a sectional view on the line Ia-Ia of Fig. 1.

Figure 2 is an elevation of a different form of 45 funnel from that of Figure 1. i

Figure 3 is a vertical section on an enlarged scale of the outlet aperture of the funnel.

Figure 3a is a horizontal section on the line I-I of Figure 3.

Figure 4 is a vertical section of the bent end of another vertical form of outlet pipe.

As may be seen from Figure 1, the device for molten welding according to the present invention consists of a shell of iron plate or the like I of funnel shape which at the mouthpiece of the funnel passes over into. a cylindrical pipe 2. The inside of the funnel is lined with a refractory lining of ceramic material or the like, for example, re clay. The funnel is capable of being dismantled and is, for example, divided longitudinally on a central plane to form two parts 4 and 5 which can be connected by flanges 6 and bolts and nuts 1, as is shown in Figure 2.

The outlet of the pipe 2 is provided with a separate replaceable mouthpiece 8 of ceramic material, the outlet aperture 9 of which has a smaller cross-section than the inside diameter of the pipe 2.

The outlet aperture 9 of the mouthpiece 8 may have a circular, elongated, or any other suitable cross-section (Figures 3, 3a.). Figure 3 shows an arrangement in which not only the mouthpiece 8, but also the end partof the protective pipe 2, is capable of replacement. The connection between the mouthpiece 8 and the lining 3 of the pipe 2 can be effected in any known manner, for instance by means of grooves and tongues as is shown in Figures 3 and 4 or by cementing or the like.

As is shown in Figure 4, the mouthpiece 8 can also be' bent sideways, for example at an angle of about 90, if it is desired to carry out welding at a point difficult of access, for example on internal combustion engines, cylinders or the like.

The funnel is conveniently provided at its upper part with an articulated suspension device, for example two pins I0, eyes or the like, by means of which the funnel is suspended by a universal or other articulated joint on a. chain, clip, or the like, which might for example be on the casting ladle II. An exemplary form of universal joint is shown in Figures 1 and 1a. 'Ihe pins III of funnel I are pivotally mounted in recesses 22 in the arms 2| of yoke 23. A rod 24 extends from yoke 23 and is rotatably mounted in a supporting member 21. A collar 25 secured to rod 24, and seated in a recess 26 in member 21 prevents withdrawal of rod 24- from member 21,

while allowing rotation of rod 24. Thus, funnel I is suspended with universal movement from member 21.

The funnel is provided with a guiding device at its central or lower part, for example with two collars I2 between which the ring I3 at the end of a guide rod I4 is articulated so that the funnel can be moved about during the operation of casting by moving the rod I4.

Welding is carried out with the device according to the present invention as follows:

Figure 1 shows in vertical section a part I4' order to cast-on the journal, molten metal is..-

poured out of the ladle Il into the upperrpart of the funnel l. It fills the funnel up to a certain height and leaves the outlet 9 in a relatively thinV stream of small cross-section and of high kinetic energy which flows on to the surface 20 ofthe journal. By moving the guide rod Ill'the lower part of the funnel and its mouthpiece'g is moved over the entire welding surface 20. The molten metal, which falls on to the welding surface 20,

forms a thin layer over the welding surface 20 and leaves the mould by the overflow or outow I8. The metal is poured in until the surface 20 of the stump l5 is sufliciently softened, which is ascertained by feeling with a rod or the like. As soon as an adequate Welding temperature and an adequate softening of the welding surface has been attained, the runner IB is stopped by a clay plug or the like and the mould is filled as far as necessary in the ordinary manner at a suitable casting temperature. Any further treatment necessary is carried out after the metal has hardened. Y

It has. been found that a satisfactory connection of the parts to be joined may be obtained according to the invention, and such as cannot be attained by means of `arc Welding, gas welding or the like. The strength of the connection is such that it can withstand severe stresses so thatthe device according to the present invention is specially suitable for dealing with articles that are exposed to severe stresses, such as rolling mill parts, parts of internal combustion engines and the like.

The funnel pipe may be cranked, as is shown in Figure 2; (for example, it can be twice bent at right-angles) when it is a question of getting into the inside of cylinders or the like, as in order to-weld the cylinder wall of a defective cylinder.

It has .been found that it is also possible to carryout cutting according to the present in- Vention. Iron castings for instance can be cut out more easily and more cheaply by means of the concentrated stream of molten metal than, for example, with gas cutting burners.

The device can be used for v,the repair of castings, thematerial vbeing introduced by the liquid method vand welded. The long funnel pipe according tothe present invention renders it pos- 'sible to vguide thestream'to any desired point,

e. g., even inthe case of complicated articles. Owing to the constricted outlet aperture in conjunction with the employment of a relatively Ylong, funnelpipaa saving in material is obtained although the stream strikes the article with great kinetic energy.

To give some dimensions which have proved suitable in practice, it may be stated that the length of the funnel pipe for the Welding of a heavy rolling mill roll can be approximately 100-150 centimetres while the outlet aperture 9 may have an inside diameter of about 10-30 mm. These dimensions can, hoWever, be altered in accordance with the particular purpose in question.

It is to be understod that the claims are not limited to the constructions shown in the drawings since clearly modifications may be made and, therefore, the claims are intended to be construed to cover all such modifications as their language will allow in the light of the prior art. I claim:

1. A device for repairing castings by pouring a molten substance into all portions of a mold which is closed at its lower end by the material to be repaired comprising a funnel portion, a hollow stem having a length substantially equal to the depth of said mold extending from said funnel portion and terminating in an outlet orifice portion, lining means for said funnel and stem, a removable lining portion adjacent to and constricting said orifice portion, tiltable means supporting said funnel portion, and universal guiding means for said stem portion, whereby said orifice portion may be directed to all parts of the interior of said mold and project said liquid substance with an increased kinetic energy through said constricted portion.

`2. A device for repairing castings by pouring a molten substance into all portions of a mold which is closed at its lower end by the material to be repaired comprising a funnel portion, a hollow stem having a length substantially equal to the depth of said mold extending from said funnel vportion and terminating in a constricted outlet orifice portion, and tiltable means for suppcrting said funnel and stem for universal movement, whereby said orifice portion may be directed to all parts of the interior of said mold and project said liquid substance with an increased kinetic energy through said constricted portion.

3; A device for repairing castings by pouring aV molten substance into all portions of a mold which is closed at its lower end by the material 'Y to be repaired comprising a funnel portion, a hollow stem having a length substantially equal to the depth of said mold extending from said funnel portion and terminating in a constricted outlet portion coaxial with the longitudinal axis of said stem, tilt-able means for supporting said funnel portion, and universal guiding means for said stem portion, whereby said orice portion maybe directedto all parts of the interior of said mold and project .said-liquid substance with an increased. kinetic energy through said constricted portion. Y

CARL oLoFJoHANNEs BRMs. 

